• Low Altitude Georeferencing for Imaging Sensors in Maritime Tracking 

      Helgesen, Øystein Kaarstad; Brekke, Edmund Førland; Stahl, Annette; Engelhardtsen, Øystein (Peer reviewed; Journal article, 2020)
      This paper presents a method for georeferencing low-altitude camera sensors, both infrared and electro-optical, in a maritime context. Accurate georeferencing require very high precision for the object pixel coordinates ...
    • Minimal Free Space Constraints for Implicit Distance Bounds 

      Haugo, Simen; Stahl, Annette (Chapter; Peer reviewed, 2020)
      A general approach for fitting implicit models to sensor data is to optimize an objective function measuring the quality of the fit. The objective function often involves evaluating the model’s implicit function at several ...
    • Mixed box palletizing; a suggestion to detect and pack unknown sized objects in bins using point clouds and genetic algorithms 

      Vasdal, Edvard Rauø (Master thesis, 2019)
      Palletering av bokser er gjort med roboter i mange år. Det er en enkel oppgave å velge en boks og stable den på en pall. Men hvis boksen har ukjent størrelse og posisjoner, er løsningen til dette problemet ikke triviell. ...
    • Modellforsøk med dukbasert avlusing Beskrivelse av gjennomføringen av modellforsøk i Hirtshals - Foreløpig rapport 

      Volent, Zsolt; Birkevold, Jens; Stahl, Annette (Research report, 2014)
      Det er avgjørende å ha god kontroll på volumet under en avlusing, for å kunne beregne innblanding av lusemidler, slik at en oppnår ønsket behandlingskonsentrasjon. En for høy konsentrasjon kan skade fisken, og for lav ...
    • Multimodal Multispectral Imaging System for Small UAVs 

      Haavardsholm, Trym Vegard; Skauli, Torbjørn; Stahl, Annette (Peer reviewed; Journal article, 2020)
      Multispectral imaging is an attractive sensing modality for small unmanned aerial vehicles (UAVs) in numerous applications. The most compact spectral camera architecture is based on spectral filters in the focal plane. ...
    • Optical flow applied to infant movement 

      Kirkerød, Harald (Master thesis, 2010)
      Healthy infants in the age group of 9 to 20 weeks post term have a distinct movement pattern called fidgety movements. The abscense of, or anomalies in these movements are indications that the infant may suffer from Cerebral ...
    • Passive depth estimation using stereo vision, an experimental study 

      Høklie, Jørgen Jøsok (Master thesis, 2017)
      This master s thesis is an experimental study on passive stereo techniques for retrieving 3D scene information. The stereo camera system is tested for finding the position of a platform relative to the stereo camera where ...
    • Post-processing and visualization techniques for isogeometric analysis results 

      Stahl, Annette; Kvamsdal, Trond; Schellewald, Christian (Journal article; Peer reviewed, 2016)
      Isogeometric Analysis (IGA) introduced in 2005 by Hughes et al. (2005) [1] exploits one mathematical basis representation for computer aided design (CAD), geometry and analysis during the entire engineering process. In ...
    • Precision fish farming: A new framework to improve production in aquaculture 

      Føre, Martin; Frank, Kevin; Norton, Tomas; Svendsen, Eirik; Alfredsen, Jo Arve; Dempster, Timothy David; Eguiraun, Harkaitz; Watson, Win; Stahl, Annette; Sunde, Leif Magne; Schellewald, Christian; Skøien, Kristoffer Rist; Alver, Morten; Berckmans, Daniel (Journal article; Peer reviewed, 2017)
      Aquaculture production of finfish has seen rapid growth in production volume and economic yield over the last decades, and is today a key provider of seafood. As the scale of production increases, so does the likelihood ...
    • Real-time Corrections for a Low-cost Hyperspectral Instrument 

      Henriksen, Marie Bøe; Garrett, Joseph; Prentice, Elizabeth Frances; Sigernes, Fred; Stahl, Annette; Johansen, Tor Arne (Journal article; Peer reviewed, 2019)
      The development of a hyperspectral imager (HSI) made from commercial off-the-shelf (COTS) parts enables the use of hyperspectral imaging on smaller low-cost platforms such as cubesats, drones, or other autonomous vehicles. ...
    • Robust Volumetric 3-D Reconstruction in a Dynamic Environment 

      Angelsen, Roy Konrad (Master thesis, 2018)
      As a part of a research project at SINTEF Ocean AS named Neodroid aiming at developing a general purpose humanoid robot to execute a variety of complex tasks, the need for perceptive ability arises. The robot consists of ...
    • Saliency based methods for camera orientation in aquaculture 

      Harr, Magnus Conrad (Master thesis, 2018)
      This thesis looks into the applicability of visual saliency as a basis for autonomous camera orientation. Autonomous re-orientation is expected to be a key component in future computer vision-based monitoring systems: a ...
    • Simple Shapes for Localization and Mapping 

      Haugo, Simen (Master thesis, 2017)
      Inspired by a procedural scene modelling technique in computer graphics, we investigate the use of continuous signed distance functions to model objects as geometric primitives, transformed and combined with set operations ...
    • Stabilization of underwater camera 

      Ur, Thomas Norum (Master thesis, 2017)
      This thesis describes the development, implementation and testing of a full scale underwater camera system for surveillance purposes in aquaculture. The mechanical development was carried out using Solidworks, and the ...
    • Teaching a Robot to Grasp Real Fish by Imitation Learning from a Human Supervisor in Virtual Reality 

      Dyrstad, Jonatan Sjølund; Øye, Elling Ruud; Stahl, Annette; Mathiassen, John Reidar Bartle (Journal article, 2018)
      We teach a real robot to grasp real fish, by training a virtual robot exclusively in virtual reality. Our approach implements robot imitation learning from a human supervisor in virtual reality. A deep 3D convolutional ...
    • Towards Underwater Biomass Estimation using Plenoptic Technology 

      Kildal, Malin (Master thesis, 2017)
      This research faces a completely new issue where it is investigated if plenoptic camera technology can provide decent depth results of objects underwater. The plenoptic camera technology has been developed as a tool meant ...
    • Unsupervised Learning of Motion Patterns for Object Classification in Aquaculture 

      Karlstad, Øyvind Rognerud (Master thesis, 2018)
      In recent years, computer vision has been used in increasing amounts in aqua culture and will be essential for the development of automated solutions for fish farming. In this thesis we study the possibility of using ...